Finding the Fourth Proportional to 1,028.72, 1,542.86 and 298.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028.72 : 1,542.86 = 298.16 : x
2. Step 2: Convert to fraction form
   1,028.72/1,542.86 = 298.16/x
3. Step 3: Cross multiply
   1,028.72x = 1,542.86 × 298.16
4. Step 4: Simplify right side
   1,028.72x = 460,019.14
5. Step 5: Solve for x
   x = 460,019.14/1,028.72
6. Step 6: Final answer
   x = 447.18